On 6/22/2012 5:37 AM, McKown, John wrote:
I am fairly sure that Shmuel's comment was about the RESERVE macro, not the hardware function. The RESERVE macro is logically equivalent to a SYSTEMS level ENQ plus a hardware reserve (unless the GRSRNL converts it to not do the hardware RESERVE). And, IIRC, the RESERVE macro generally does not immediately result in the hardware reserve being done before returning to the user. It simply marks the UCB somehow so that the hardware reserve is done at the beginning of the next I/O operation on the device. I'm not sure that this is still true or not.
Still true unless SYNCHRES(YES) is specified on the GRSDEF statement in GRSCNFxx. -- Edward E Jaffe Phoenix Software International, Inc 831 Parkview Drive North El Segundo, CA 90245 310-338-0400 x318 [email protected] http://www.phoenixsoftware.com/ ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
